Technology and Equipment Used by Deaf People

Transcription

1 Technology and Equipment Used by Deaf People There are various aids and equipment that are both used by Deaf and Hard of Hearing people throughout the UK. A well known provider of such equipment is from The Royal National Institute for Deaf People (RNID). For more information then please go to Sometimes social services provide this equipment free of charge on a loan basis. Let s look at some types of equipment that is used. Listening Devices With regards to television, radio and conversation people often make the mistake of thinking if you can make the sound louder then everything will be much clearer and immediately accessible to deaf people. Bearing in mind the groups of Deaf and Hard of Hearing people that we discussed earlier in this book it is not surprising that they would most likely use different equipment to suit their needs. What does listening equipment do? Listening equipment makes sound louder or 'amplifies' it. It is usually available with accessories including headphones, stetoclip headsets, a neckloop or an ear hook, making it useful in a range of situations at home or at work. Listening equipment can help you hear: conversations at home or in your car on your phone or mobile phone at meetings and lectures the TV or the stereo. Listening equipment can be used whether or not a hearing aid is worn. The type of listening equipment and the accessory that is chosen will depend on the level of the hearing loss. A basic model has a box containing an amplifier, a built-in microphone to pick up sound, and a dial or push button volume control to make sound louder or quieter. More advanced models have some additional features: Automatic Gain Control (AGC). This feature automatically reduces the amplification on very loud sounds

2 A tone control. This lets you change treble tones that can help make speech clearer. Some may also have a switch that can reduce low frequency (bass tone) background sounds a socket to plug in an extension microphone - this lets you listen to conversation, the TV, radio or stereo system from across the other side of the room. Connection leads that plugs directly into your TV (scart socket) or stereo system. This usually gives better sound quality than an extension microphone a 'T' switch to listen to a loop system There are various accessories available for listening equipment and what is chosen is dependent on the level of the hearing loss and whether or not a hearing aid is worn. Over-the-ear and in-the-ear headphones, and stetoclip headsets Most listening equipment comes with over-the-ear, in-the-ear (button style) headphones or stetoclip headsets. In-the-ear headphones stop sound from leaking out too much, which means that other people around you cannot hear what you are listening to. They may be louder than over-the-ear headphones because they fit into the ear. Over-the-ear and in-the-ear headphones are suitable for people with normal hearing but you may also find them useful if you have a mild to moderate hearing loss. Stetoclip headsets are similar to headphones but tend to produce a louder sound, so you may find them useful if you have a moderate hearing loss. The frequency range of stetoclip headsets is not usually as wide as over-the-ear or in-the-ear headphones so their sound quality is not as good. You should take extra care when you use them because they are very loud. Neckloops If you wear a hearing aid, a neckloop may suit you better than headphones. A neckloop consists of a loop of wire that goes round your neck. It plugs into the headphone socket on most listening equipment. You need to switch your hearing aid to the 'T' position to pick up sound via the loop. You can plug in a neckloop into the headphone socket on your personal stereo, stereo system or your TV. You may need an extension lead when using a neck loop with a TV. The signal from a neckloop is always in mono sound - you cannot get stereo sound. Mono means that you hear the same sound in both your left and right sides when you listen through headphones or loudspeakers. Stereo means that the left and right sides carry different but related sounds. Ear hooks An ear hook works in a similar way to a neckloop but it hooks over your ear next to your hearing aid. To pick up the sound signal from the ear hook, switch your hearing aid to the 'T' position. You can use an ear hook on either your left or right ear, depending on which side you use your hearing aid.

3 You can also get a 'dual version' ear hook, for both ears. You can use these to listen to your personal stereo if you use hearing aids in both ears. Silent' headphones - headphones with a magnetic signal If you prefer not to use neckloops or ear hooks, you may find a pair of 'silent' headphones useful. They look like headphones but produce a magnetic signal like a neckloop or earloop so you'll need to switch your hearing aid to 'T' to use them. You can get different versions of 'silent' headphones. Some have sound on one side and a magnetic signal on the other while others have a magnetic output on both sides for stereo listening. Silent headphones can be used with most personal stereos and you can also use them with your TV and stereo equipment if you have an extension lead. Noise cancelling headphones These will suit you if you have mild to moderate hearing loss and you do not wear a hearing aid. Noise cancelling headphones reduce background noise, helping you to focus on the sound you are trying to listen to. They can be useful in very noisy environments, such as on an aeroplane. Standard headphones Some standard headphones naturally produce a magnetic signal that your hearing aid may be able to pick up when it is switched to 'T'. You may find that you need to turn up the volume control on your equipment and/or your hearing aid to get a loud enough sound. People around you may be able to hear the sounds coming out from the headphones and this may annoy them if you turn the volume up very high. Cordless listening equipment You may find cordless listening equipment useful if you do not like wearing equipment with wires, or you want to be able to move around a room easily. You can use cordless listening equipment in a range of situations; for example at home, during conversations, or when watching your TV. Cordless infrared headphones You can get these from high street stores but they are not specifically designed for deaf people. However, they can be useful if you have a mild to moderate hearing loss. Cordless infrared headphones have two parts - an infrared transmitter and cordless infrared headphones. The infrared transmitter plugs into the scart or phono socket on your TV or stereo system and you wear the cordless headphones. Most cordless infrared headphones have a volume control and are powered with rechargeable batteries. This can make the headphones quite bulky and heavy to wear. You have to use the headphones in the same room as the transmitter because infrared signals cannot go through walls.

4 Cordless FM headphones You can also get cordless FM (Frequency Modulation) headphones from high street stores but they are not designed specifically for deaf people. However, like cordless infrared headphones, they can be useful if you have a mild to moderate hearing loss. Cordless FM headphones look and work like infrared cordless headphones, but instead of using infrared signals between the transmitter and headphone they use radio signals. The main advantage of cordless FM headphones is that they can pick up the signal from the transmitter anywhere in the home - and depending on the range, even in the garden. The next device that is used by deaf and hard of hearing people is the minicom or also described as a text phone. Minicom/Textphone A textphone is telephone device that has a keyboard and a display screen. You type what you want to say rather than speaking into a mouthpiece. You can use a textphone instead of a voice telephone if you are deaf or if you have problems with your speech. In the UK, companies often use the word Minicom rather than textphone. In fact, Minicom is a widely used brand of textphone. When using a textphone to call another textphone user, simply type your message using the keyboard and the other person can read what you have written on their display screen. Whatever the person on the end of the line is typing back to you will come up on your screen. People use abbreviations when making a textphone call so it is useful to learn these: GA Go Ahead. This is used after the end of each piece of conversation. It tells the other person that you have finished and that it is their turn to type a reply. BIBI Bye Bye. This is usually followed by SK. SK Stop Keying. This tells the other person that it is the end of your conversation and you want to end the call. When you get a text reply on your screen you need to type your response, followed by GA. Your message shows on the other person s textphone and their reply then appears on your screen. The conversation carries on until one of you types SK and ends the call. You will pick up other useful short forms the more you use a textphone. If you re using a textphone to call a voicephone user, you will not be able to connect to them directly. When they pick up the telephone, they will simply hear a prerecorded message such as Hearing impaired caller, please use a textphone or they will just get silence. You need to call them using a relay service. At the moment, the only national text relay service in the UK is RNID Typetalk. It is operated by the BT service BT TextDirect. How does RNID Typetalk work? If you have a textphone and want to contact someone with a telephone, just add a BT TextDirect prefix to the full national, international or mobile number you are calling. Then one of RNID Typetalk s Relay Assistants will join the call to relay text-to-voice and voice-to-text calls.

5 Use the following codes: Textphone users calling telephone users dial Telephone users calling textphone users dial If you need emergency services police, fire, ambulance, coastguard or mountain rescue services dial and you will be connected directly. You do not need to dial 999. If you are a textphone user calling another textphone user and you do not want a Typetalk Relay Assistant to relay your call, put in front of the number you are dialling. Even if you connect with a hearing person, a Typetalk Relay Assistant will not join your call. If applicable, you will still receive a rebate on the text part of the call. BT TextDirect also provides network messages in text or voice to let you know if the number you are calling is ringing, busy, or wrong. Alerting Devices There are various 'alerting' devices which enable the deaf or hard of hearing person to be 'alerted' to certain sounds within their own home. For example if the alarm clock goes off, the baby in the cot is crying, someone is at the door, or indeed if there was a fire. Examples of alerting devices would be alarm clocks, baby monitors, doorbells, multi alerting systems, and smoke alarms. The Royal National Institute for the Deaf is a good source of information for alerting devices. Some social services departments also provide this equipment.